User Guide

6015/6015i/6016i/6019i (RH-55), 6012 (RM-20)

System Module Nokia Customer Care

Phone Keys

Other keys are detected so that when a key is pressed down, the metal dome connects

one S-line and one R-line of the UPP to the GND and creates an interrupt for the SW.

Table 11 shows how lines are connected and which lines are used for different keys. The

S-line S0 and R-line R5 are not used.

*NC = Not Connected

Lights

The phone has five LEDs for lighting purposes: two (V1-V2) blue LEDs for the keyboard,

and three (V302, V303, and V304) white LEDs for the display.

The display and keyboard lighting is controlled by a DC/DC driver (charge-pump type).

The driver is enabled by Klight. The current for the display is controlled from the driver,

with the current setting coming from R303. The keyboard lighting LEDs each have a

separate current source and the currents are controlled by R30 and R301.

The LEDs have a white plastic body around the diode, which directs the emitted light to

the UI side.

Vibra

The vibra is located on the bottom of the D-cover and is connected by spring connectors

on the PWB.

The vibra is controlled by a VIBRA PWM signal from the UEM. This signal allows control

of both frequency and pulse width of the signal. Pulse width is used to control the

current when the battery voltage changes. Frequency control searches for optimum

frequency to ensure silent and efficient vibrating.

Table 11: Line Connections

Returns /

Scans

S1 S2 S3 S4

R0 Left Send End Right

Soft left Up Down Soft right

1 4 7 *

2 5 8 0

3 6 9 #

Table 12: Vibra Parameters

Parameter Requirement Unit

Rated DC Voltage 1.25 V